chore: Update changelog for v2.5.13
chore: Update changelog for v2.5.13

Change-Id: I1fae3a88387a638e808d010efe7fad5dc049d37a

shaka-project/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,tvoli/shaka-player,tvoli/shaka-player